Overview
ISO 12822:2020 - Glass packaging - 26 H 126 crown finish - Dimensions defines the geometric and dimensional requirements for the 26 mm shallow crown finish used on glass beverage bottles. The document specifies the shape and critical dimensions (shown in Figures 1–5) that ensure compatibility with metal crown caps (crown caps/crown closures). It focuses on practical dimensional control to secure sealing performance, manufacturability and capsuling equipment compatibility.
Key Topics and Technical Requirements
- Finish designation: 26 H 126 shallow crown finish for 26 mm crown caps.
- Critical dimensions: Detailed profile and dimensions are provided in Figures 1–5 (dimensions in millimetres). Key callouts include:
- Entry diameter (d): between 17.0 mm and 18.5 mm, measured up to 3 mm below the top of the finish.
- Broaching diameter: Ø 15.5 mm (brochage).
- Sealing surface details (Detail X): options and requirements for smooth, defect‑free sealing surfaces.
- Crimping/contact point (“point P”): defined for interaction between glass finish and crown skirt when seamed.
- Recommended radius at sealing edge: 0.5 mm to 0.8 mm, optimally near 0.5 mm.
- Surface quality: The sealing contact area must be smooth and free from defects; avoid contact between the crown gasket and the inner seam line of the glass mold joint.
- Tolerances: General dimensional tolerances are to conform to ISO 9058 (standard glass bottle tolerances).
- Design flexibility: Non‑specified characteristics may be chosen according to application; additional dimensional limits may be imposed by capsuling equipment.
- One‑way bottles: For single‑use (“one‑way”) bottles, the entry diameter may be ≤ 18.5 mm by written agreement among bottler, glassmaker and crown manufacturer.
Applications and Who Uses It
ISO 12822:2020 is essential for:
- Glass container designers and manufacturers (glassworks) specifying finish geometry for beverage bottles.
- Crown cap manufacturers to ensure cap-to-finish compatibility.
- Bottlers, beverage packagers and filling-line engineers setting up capping equipment.
- Quality assurance and regulatory teams validating sealing performance and dimensional conformity.
- Suppliers coordinating bottle–cap interfaces to prevent leakage and production downtime.
Practical benefits include improved sealing reliability, interchangeability between suppliers, and reduced risk of capping failures on production lines.
Related Standards
- ISO 9058 - Glass containers - Standard tolerances for bottles (tolerancing guidance).
- EN 17177 - Glass packaging - Crown caps, 26 mm diameter, 6 mm height (cap specification).
- GME/Cetie reference GME 13.02 (historical reference for 26 H 126).
Keywords: ISO 12822:2020, glass packaging, 26 H 126, crown finish dimensions, crown cap, bottle crown finish, crown cap dimensions, packaging standards.
